[basch]

On iPhones you swipe right from the Lock Screen. Android has a shortcut to double tap the power button.

I don’t know if I ever go searching for an app to open a QR code.

[sumtechguy]

Think both of those actions are open camera app?

[basch]

And then you point the camera app at the QR code, and then click the link that appears over the QR code. Neither Apple nor Android require a QR code reader app.